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Show Th. i:mH,ril,.n i,f d.1,1. H Sir W. U. Koberls-Austen has proved H through nn experiment extended over 'iLb four years that when n column of lead H Is allowed la rest upon a column of B gold a stow diffusion or evaporation of IH tho gold taken place, resulting In tho H appearance of traces of gold In tho Wm lead. When a dereo of heat not suf- 'tSsV flclcnt to melt cither of tho metals Is iisB applied, tho diffusion of tho gold takes iVrnt placo more rapidly, Tho tendency ol IKQJ. the particles Is upward Into the lead. 'OP As far as Is yet known the evaporation ,1, of gold occurs only In the presence of XlBf another metal. SVi |